How to get a clip's source media starting and ending frame numbers?
Here is a script that prints strip details to the system console.  Note how the python property names are shown when you mouse over the field in the Properties Panel of the VSE. If this answer is heading in the right direction, give me a heads up and can edit to format the output more specifically to suit your needs.

import bpy

context = bpy.context
scene = context.scene
vse = scene.sequence_editor

for strip in vse.sequences_all:
    # Edit Strip Panel
    print("-" * 72)
    print(strip.name)
    print(strip.type)
    # extend for other strip types.
    if strip.type in ['MOVIE']:
        print(strip.filepath)
    elif strip.type in ['SOUND']:
        print(strip.sound.filepath)
    print(strip.channel)
    print(strip.frame_start)
    print(strip.frame_final_duration)
    # Trim Duration (soft)
    print(strip.frame_offset_start)
    print(strip.frame_offset_end)